"Characterization by photo-quadrats" Delivrables

jeudi 4 juin 2015
par  Dorian GUILLEMAIN, Romain DAVID
popularité : 24%

Index of "Characterization by photo-quadrats"
1. Principle
2. Method
3. Sampling
4. Deliverables
5. To summarize
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How to cite this content :

David R., Arvanitidis C., Çinar M.E., Dubar J., Dubois S., Erga Z., Guillemain D., Sartoretto S., Thierry de Ville d’Avray L., Zuberer F., Chenuil A., Féral J.-P., (2014), with contributors : Açik Çinar S., Andral B., Aurelle D., Aysel V., Bakir K., Bellan G., Bellan-Santini D., Bouchoucha M., Celik C., Chatzigeorgiou G., Chatzinikolaou E., Chenesseau S., Dağli E., Dailianis T., Dimitriadis C., D’Iribarne C., Doğan A., Dounas C., Egea E., Elguerrabi W., Emery E., Evcen A., Faulwetter S., Gatti G., Gerovasileiou V., Güçver S.M., Issaris Y., Katağan T., Keklikoglou K., Kirkim F., Koçak F., Koutsoubas D., Marschal C., Önen M., Önen S., Öztürk B., Panayiotidis P., Pavloudi C., Pergent G., Pergent-Martini C., Poursanidis D., Ravel C., Reizopoulou S., Rocher C., Ruiton S., Sakher S., Salomidi M., Sarropoulou E., Selva M., Sini M., Sourbes L., Simboura N., Taşkin E., Vacelet J., Valavanis V., Vasileiadou A., Verlaque M. Protocols for monitoring of coralligenous habitats of mediterannean (Coralligenous based Indicators to Evaluate and Monitor the "good ecological status" of the MEDiterranean coastal waters) Protocoles de suivi du coralligène en méditerranée (Coralligenous
based Indicators to Evaluate and Monitor the "good ecological status" of the MEDiterranean coastal waters).

a. Image processsing with the software PhotoQuad

[§ 1] Image processing will be carried out through the software PhotoQuad. (http://www.mar.aegean.gr/sonarlab/photoquad/index.php). This software of 2D image analysis is equipped with tools of spatial analysis (such as cover measuring), and species counts.

[§ 2] The identification of species, will be done manually at first. For this, it’s possible to start by applying, on each photograph, 100 "randomly stratified" points. Then, each point is associated with a species or a category (rock, sediment, holes, etc.) from a library predefined and refillable as and when data processing with PhotoQuad (Figure 1).

PNG - 458 ko

Figure 1 : photograph processing with the software PhotoQuad on photo of GoPro

[§ 3] When processing photographs, non-exploitable zones of the pictures should not be taken in account for the analysis of metrics : such as dark corners, unidentifiable species…
Photographs should be of sufficient quality to enable the identification of species : this level of quality is to determine during the beginning of the protocol implementation. It should represents the best quality/cost ratio (in terms of resolution, brightness, colour, …)

b. Statistical analysis

[§ 4] Statistical analyses will be performed using the R software. We will focus on taxa’s presence/absence, percent cover, taxa assemblages, and relations among between taxa’s abundances, and they will also be compared to environmental data.

WE EXPECT YOUR SUGGESTIONS OF CORRECTIONS !

- Deadline : 14th December 2015
- Please add comments for each paragraph (§) by means of a corrected new version (one form per §)
- It is recommended to add scientific references if necessary

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